SU1201174A1 - Device for vector -mosaic conversion of characters - Google Patents

Abstract

DEVICE FOR CONVERTING FONT .RASTROVOGO vector comprising address calculator coupled to the first output font characters with corresponding data inputs of the control unit, the register read fonts connected through input unit storing fonts with fonts configuration register address outputs and Font size register, wherein that, in order to extend the functionality, it has a memory block of variable characteristics of the font contour lines, the initial setup register of the , a segment length registration unit, a font address conversion block, an additional calculator block, an information interface block and a scan line end detection block, the second and third outputs of the character address calculators are additionally connected to the first input of the font address register and the font scale register input , the output of which is connected to the first input of the block of an additional calculator, the first output of the font read register is connected to the first inputs of the memory block of variable characteristics configuration Fonts, the second outputs of the register for reading tiffs are associated with the second inputs of the auxiliary calculator block, the third output of the font read register is connected to the input of the scanning line output terminal registration unit, the first output of which is connected to the first input of the control unit, and the second output is connected to the second input of the block memory of variable characteristics of the configuration of the font, the third inputs of which are connected to the first outputs of the auxiliary power block, fourth inputs (L of the memory block of variable character A font configuration source is connected to the first output of an address conversion block connected by an output to a second input of an address register; the first outputs of a memory block of variable font configuration characteristics are connected to third inputs of an additional calculator; second output of a memory block of variable font configuration characteristics is connected to the first the input of the address conversion block, the third output of the memory block of the variable characteristics of the font configuration is connected to the second input of the control block and the second input home address conversion unit outputs the second additional block calculator connected to the first input unit interface information, the third additional calculator unit outputs coupled to inputs of the recording unit length of the segment, the output of which is connected to a fourth input of

Description

the additional calculator unit, the fourth output of which is connected to the input of the register of the initial setup of the coordinate, the output of which is connected to the second input of the information interface block, controls the output of the additional input unit connected to the third input of the control unit, connected to the control outputs

201174

responsive control inputs of the memory block of variable font type characteristics, block for recording the length of a segment, block for ending the length of the scanning line, block for converting addresses, block for additional calculator, block for interfacing information and register of initial setting of the coordinate.

The invention relates to printing equipment.

A device for vector-fracture font conversion is known, containing a font character address calculator connected by first outputs to the corresponding information inputs of the control unit, a font status register register connected by inputs through the font configuration memory with the font address register, and the font size register 1 J.

However, the functionality of the known device is limited.

The purpose of the invention is / expanding the functionality of the device.

The goal is achieved by the device for vector-font font conversion containing the font character address calculator connected by the first outputs with the corresponding information inputs of the control unit, the font read register connected by inputs through the font configuration memory from the output of the font address register, and the font scale register , has a memory block of variable characteristics of the font contour line, the register of the initial installation of coordinates, the block for recording the length of segments, the block reobrazovani font address calculator unit of the complementary block data interface and registering scan line termination unit, wherein the second and third outputs address calculator characters are further connected to the first input of the address register and font scale output register

the font, the output of which is connected to the first input of the additional calculator, the first output of the font read register is connected to the first inputs of the memory block of variable font configuration characteristics, the second fonts of the font register are connected to the second inputs of the additional calculator, the third output of the font read register is connected the input of the unit for registering the end of the output of the scanning line, the first output of which is connected to the first input of the control unit, and the second output is connected to the second input of the memory storage unit Characteristics of the font configuration, the third inputs of which are connected to the first steps of the additional calculator block, the fourth inputs of the memory block of the changing characteristics of the font configuration are connected to the first output of the address conversion block connected to the second input of the address register, the first outputs of the memory block are changed Characteristics of the font configuration are connected to the third inputs of the additional calculator; the second output of the memory block of the variable characteristics of the font configuration is The third output of the memory block of variable font configuration characteristics is connected to the second input of the control unit and the second input of the address conversion block, the second outputs of the additional calculator are connected to the first inputs of the interface module, the third outputs of the additional calculator connected to the inputs of the length registration block seg312

The copier whose output is connected to the fourth input of the additional calculator, the fourth output of which is connected to the input register of the initial installation of the coordinate, the output of which is connected to the second input of the information interface block, controls the output of the additional calculator connected to the third input of the control unit connected control outputs with the corresponding control inputs of the memory block are variable; font configuration characteristics, segment length detection block, line length ending block and scanning, the address conversion unit, additional calculator unit, CIU information and register the coordinates of the initial installation.

Figures 1 and 2 show the lengths () of the sign segments, segments (1,2, ..., 10) of the outer contour lines, TSV table of the vertical sign segments and the tag table of the horizontal sign segments, in fig. 3 - 5 - rasterization of vectors J in Fig. 6 - a set of letters in Fig. 7 and 8 - a functional diagram of the device.

The proposed device contains a font configuration memory 1, a control block 2, an initial setup register 3, a vector address buffer multiplexer 4, a remainder buffer multiplexer 5, a scale register 6, a segment length register multiplexer 7, a coordinate multiplexer 8, a reference coordinate multiplexer 9, register 10 segment length, buffer 11 coordinates, buffer 12 reference coordinates, buffer 13 increments dx, buffer 14 increments, buffer 15, addresses of vectors, buffer 16, feature of the direction of detour, buffer 17, balance, register 18, addresses file; memory of 19 buffer addresses; register of 20 number of transitions; counter of 21 transitions; memory of slope 22; output multiplexer 23; counter of 24 font addresses; comparator 25; multi-. -plexers 26 and 27 of the first and second terms multiplexers 28 and 29 of the first and second factors, counter conversion control circuit 30, additional calculator 31, multiplier 32, additional calculator register 33, multiply register 34 74

l, output buffer 35 per line, bus

36-signal Bit direction, bus

37signal End of line, signal bus 38 Negative value, calculator 39 character addresses, zero signal bus 40, signal f1 bus 41, scale register output 42, data bus 43, start coordinate register output 44, buffer address storage output 45, buffer output 46 coordinates, output 47 of the reference coordinate buffer, output 48 of their incremental buffer, output 49 of the 4U incremental buffer, output 50 of the vector address buffer, output 51 of the remainder buffer, output 52 of the segment length register, output 52 of the tilt memory, output 54 of the complementary register A new calculator, multiplier register output 55, control output 56, address bus 57, font memory address register 58, font memory readout register 59, interface memory bus 60, address bus 61, output tangent buffer output 62, address increment bus 63, bus 64 - decreasing the address by one, buffer 65 tangent values, control bus 66, address bus 67, Start bus 68, Start bus, Signal bus 69, ready trigger 70, encoder 71, constant memory address selection circuit 72 , register. counter 73 addresses of permanent memory, post read only memory 74, a register 75 a read permanent memory, a logic matrix 76 77-80 bus clock encoder 81, and a bus signal End sign.

Memory block of changeable characters. The font configuration settings are formed by buffers 11–17, multiplexers 4,5,8 and 9, register 18 buffer addresses, memory 19 buffer addresses, slope memory 22, and buffer 65.

The block for recording the length of a segment contains a multiplexer 7 and a register 10.

The block of the end of the scanning line length consists of a register 20 of the number of transitions, a counter of 21 transitions and a comparator 25..

The address translation unit comprises a font address counter 24 and a counter conversion control circuit 30.

The block of the additional calculator is formed by the multiplexers 26 - 29, the additional calculator 31, the register 33 of the additional calculator, the multiplier 32 and the register 34 of the multiplier. I The information interface block consists of the multiplexer 23 of the output buffer 4 and the output buffer 35 per line. The outputs of the calculator 39 of character addresses are additionally connected to the input of the register 58 of the font address and the input of the register 6 of the scale, the output of which is connected to the first input of the block of the additional calculator, and the output of the register 59 of the font font is connected to the first inputs of the memory block of the variable characteristics of the font configuration , the second inputs of the additional calculator unit and the input of the registration unit of the end of the output of the scanning line, the first output of which is connected to the first input of the control unit 2, and the second output to the BTOpbtM input b memory location of variable font configuration characteristics, the second inputs of which are connected to the outputs of the additional calculator, third inputs are connected to the output of the address translation block additionally connected to the second input of address register 58, first outputs of the memory block of variable font configuration characteristics are connected to the third inputs the block of the additional calculator, the second output of the memory block of the variable characteristics of the font configuration is connected to the input of the address conversion block, the third one, the output is with the second input of control unit 2 and the input of the address conversion block, the outputs of the additional calculator block are connected to the first inputs of the interface block, the inputs of the segment length recording block whose output is connected to the fourth input of the additional calculator block, and the input of the initial setting coordinate 3, the output of which connected to the second input of the interface unit, a control output; an additional calculator unit connected to the third input of the control unit 2, which by the outputs is connected to the register 3; initial kooprfknaty, the gate inputs of the memory characteristics of variable configuration unit shrif one recording unit segment length, block length completion of a scan line, the address conversion unit, the additional unit and the calculator unit interface informatstii, Principle device is as follows. The boundaries of the font letters are the lines on which the number of black-and-white transitions changes during scanning. At this point, the lines of the outer contour, respectively, begin or end. The outer contour lines are numbered in the order of growth along the vertical OR horizontally inside the segments. The number of lines in the outer contour of the mark coincides with the number of black-and-white transitions during rasterization. The description of the vertical and horizontal segments is the key to the description of the entire sign. This description should contain the length of the segment and the line numbers of the outer contour in the segment. Segment data containing this information should be stored in two segment tables for vertical and horizontal scanning, respectively. During the operation of the photo-diagonal machine, the coordinates of the contour transitions at the intersection points of vectors with vertical lines are restored by the values of the initial coordinate Y (the projection, the vector on the y-axis and the tangent of the angle determined by the projections of vectors on the coordinate axis of the ILH ILU) scans. In FIG. 3, the following symbols are accepted: H (O, 0) —the origin, yy P — coordinates of the initial points of the contour for vertical and horizontal scanning; dx, DU — projections of vectors on the coordinate axes. For raster scanning devices using The values x, & x and cotangent of the same angle. In figure 4 are shown (O, 0) - the origin, (y, Xd), y, -, x) and (y, Xj) - the coordinates of the beginning, midpoint and end vector; dx, and DN., lx, and dy are the projections of the vector or its part on the coordinate axes, and θ is the angle determined from the projections of the vectors. The initial coordinates X0, the lines should be stored in special tables in front of an array of vectors. 7 When describing vectors in a memory on carriers, the increments of the coordinates of the ends of their vectors, 4y, are written into an array of font information. The increments of the coordinates of the vectors are written in the order of traversing each closed loop. The information should contain an indication of the direction of the loop traversal. For the array sampling procedure, it is necessary to have the addresses of the first vectors in the lines in the information array. It is advisable to group these addresses and the above initial coordinates relating to the first vector in each line into tables of coordinates and addresses. These values are separately grouped for devices with vertical and horizontal scanning. Figure 5 shows: 4у, Лх projections of the i-th vector on the coordinates bei; AD is the address of the 1st vector in the i-th LINE; at p. - the initial coordinate of the line; circuit i is a sign of the direction of the detour; TAKB - a table of addresses and starting coordinates for vertical scanning -, TAKG - a table of addresses and starting coordinates for horizontal scanning, TBC a table of vertical segments; tag - a table of horizontal segments, CT - the end of the table. The tables contain rows that correspond to the numbers of the lines of the outer contour, i.e. numbers of transitions from black to white, which are obtained in the process of processing vectors with vertical or horizontal rasterization. Recording the increments of the coordinates of the ends of the vectors with a certain direction of contour traversal and the presence of four tables makes it possible to create a universal unified system for coding font information that does not depend on the type of input device. The table of addresses and initial coordinates and a table of segments for vertical or horizontal scanning depending on from the device type and the increments of the coordinates of the ends of the vectors k, ddu are read into the device buffer. First, the data from the tables — the initial coordinates of the lines and the addresses of the first vectors — are selected and placed in the corresponding buffers. Next, using the tables of segments, we determine the numbers of the contour lines to be processed in each of the segments. By these numbers, the device accesses the corresponding buffers, in which the initial data and data dynamically changing during the operation are recorded. First, the first line vector is processed. Using the scale factor, the initial Mood coordinate is determined for the photo-diagonal machine or for the raster scanner, and the vector is rasterized along. y y. ± tg0 (1) for a photo dialer or x - x .ctg9 (2) for a raster scanner. Thus, recording the increments of the coordinates of the ends of the vectors in a certain direction of walking around the closed contour and the presence of tables of coordinates of the starting points of the outer contour lines and addresses of the increments of the coordinates of the ends of the vectors at the starting point of the outer contour lines, as well as tables of vertical and horizontal segments, expands the technological possibilities of using coded characters in output machines of various types and provides memory savings on font information carriers. The calculator 31 serves to perform addition and subtraction operations on operands arriving at the inputs of the adder-subtractor through multiplexers 26 and 27, Counter 21 serves to count the number of processed transitions in the scanning line. This counter counts from 1 to N (where N is the number of transitions on the processed symbol segment). Multiplexers 7, 8, 9, 4, 5, 23, 26-29 serve for switching information /. output signals coming from different directions depending on the control signal codes. Code sensor 71 serves to synchronize the operation of the entire device. It crawls the Run signal from block 39 via the ready trigger 70. After starting the sensor 71, the signal 69 indicates that the device is busy. In each clock cycle, the signal 77 from memory 74 to data register 75 is counted

A rare control word that is written to data register 75 by signal 78. The control word consists of the actual control part 66, entered into the logic matrix 76, and the address part, which is fed via bus 61 to the address register 73 of the address. The address control circuit 72 records the contents of the address word of the control word into the address register 73 when internal signals 37 and 38 are present. If there are no signals 37 and 38, the control circuit 72 increases the content 73 by 1. The control signals 66 gated by the sync pulses 79 arrive to the outputs 56 of the logical matrix 76. The signal 81 reports the first sign processing.

After switching on, the device operates as follows.

The working font set is rewritten from the disk of the block 39 into the block 1 of the memory. The set size determines the scaling factor M and is set by a special command from calculator 39. The value M is written to scale register 6.

The processing of the sign begins with the initialization of the working buffers 11, 12, 15, and 16 of the current coordinate, the reference coordinate, the address of the vector, and the sign of the direction of the walk.

Each line of the buffer stores information relating to a separate outer contour line.

 During the initialization of the buffers, the addresses of the first vectors and the signs of the direction of walking around the contour lines are directly written from block 1 to the working buffers 15 and 16.

The initial coordinates (for the photo-diagonal machine) and x (for expanding the scanning device) of the contour lines are written to register 3 and then passed through the control circuit 30, the multiplexer 29 of the second factor to the multiplier 32, which is scaled according to M, which is entered in block 32 register scale 6 through multiplexer 28 of the first factor. The signal from the bus 40 zero signal through the first input of the multiplexer 5 enters the buffer 17 of the balance.

Data from a segment table that describes which contour lines are processed on a given segment.

17410

the sign, from the control unit 2, goes to the memorization node of the buffers 19, and the segment length with a constant number of transitions S through the control circuit 30 and the multiplexer 29 of the second factor is fed to the block 32. The value of S is multiplied by M, arriving at the second input multiplier, and MS value. through the multiplexer, the register 7 of the segment length is written to the length register 10.

At the address of the vector, from the working buffer 15 addresses of the vectors are matched

The values of the projections of the vector Dx and Y are written to the working buffers 13 and 14. The 4x (yy) value through the first input of the multiplexer 29 of the second factor is fed to block 32 and. then, the size of the photo-diagonal machine or the raster scanner of the device from the multiplier register 34 through the third input of the multiplexer 26, the first term enters the calculator 31, in which it is added to the remainder of the remainder buffer.

The result of the summation from register 33 through the multiplexer of the remainder of buffer 5 is placed in the work buffer 17 of the remainder. Further . 4x and yu values from the working buffers 13 and 14 go to the two inputs of the device 22. The slope tangent (tg b) for the photo-diagonal machine or the cotangent of this angle (ctg 6) for the raster scanner from the output of the memory 22 goes to the first multiplexer input 27 of the second term and the fourth input of the multiplexer 29 of the second factor. The current coordinate y (x) is supplied from the buffer 11 coordinates via the first input of the multiplexer 26 of the first term to block 31, where it is added to tg 6 (ctg b). The result of the addition from register 33 is written in place of the current coordinate in work buffer 11 and in output buffer 35 per line.

To determine the last scan line crossing this vector, the remainder from buffer 17 is fed through the first input of the multiplexer 23 and the input of the multiplexer 26 of the first term to the register 33. The signal + is fed to the other input through the multiplexer of the second term 27. If the result of the subtraction is negative, then work begins. on the new vector, for which the coordinate of the new reference point is determined. To do this, the second input of block 3 through the second input of multiplexer 29 of the second multiplier from the working buffer 14 receives the increment JUSx), and the first input is the value M from the scale register 6. The result of multiplying Schu for a photo of a typesetting machine or Шх for a raster scanning device from the register of multiplier 34 through the second input of the multiplexer 27 of the second term goes to the second input of the block 31, to the other input of which through the second input of the multiplexer 26 of the first term th reference coordinates supplied from the buffer 12, the reference coordinates. The result of the addition is written to the work buffer 12 of the reference coordinate. Then, from block 1, they are read to the th of the next vector. Address of the following vector of the current line AD; 4 is determined using the vector address counter 24, which performs the operation: ± 1, 3) where AD, is the address of the current vector loaded into counter 24 from the address buffer of the current vector 15. The action sign in expression (3) is determined by the value of the attribute directions of detour, which comes from buffer 16 to control unit 2. At the obtained address of the next vector, the new values Lh and lu are loaded from block 1 into working buffers 1 and 14. To determine the first coordinate of the intersection point of the next scan line with the new vector, the remainder from the residual buffer 17 is fed through the fourth input of the first multiplexer 28 to the first the input of the block is 32, and to the other input of the multiplier, through the multiplexer 27, tg0 ctg comes) from the tilt memory 22. The obtained value of 4tg in (dctgfl) from the register of multiplier 34 enters unit 31, where it is added to the reference coordinate, and the result of adding through the first input of the multiplexer 8 coordinates is placed in the coordinate buffer -11. 742 The number of transitions in the segment of the sign comes from block 1 to the register 20 of the number of transitions. The jump count 21 starts counting from zero, and when its value coincides with the value in the jump count register 20, the counter is reset, and the End of Line signal is given to comparator 25. After the counter 21 is reset, the value MSj from the length register 10 through the second input of the multiplexer 26 of the first term 26 is fed to the input of the first term of the block 3-1. Its other input is supplied + through the fourth input of the multiplexer 27. The second term. When the result of the subtraction is negative in block 31, a negative signal is received from its register 8 in control block 2. This signal from block 1 loads the description of the next segment and the scaling and rasterization process continues until the end of the sign. Control unit 2 provides control signals 56 to the registers, multiplexers, and device buffers. In unit 2 controls each. The control word is sampled from the permanent memory 74. The selected control word is fed to the inputs of the logic matrix 76, where it is mixed with synchronization pulses produced by the code sensor 71. The circuit 72 serves to organize the transition to the address specified in the control word, in the presence of signals 37 and 38. Signals 56 from the outputs of logic matrix 1 directly control the operation of all nodes of the device. Thus, the operation of the device occurs in several stages: 1) the stage of loading the table of addresses and coordinates; 2) the stage of loading the segment table line; 3) segment rasterization stage; 4) the stage of choosing a new vector. The moments of the transition to these stages (1-4) in the process of recruiting the letter O are shown in Fig.6. In the process of typing a word consisting of a series of letters, the pattern of the change of stages has a similar appearance. The proposed device can be used both in a photo dialer machine and in a laser scanning device without any changes.

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Claims (1)

DEVICE FOR VECTOR-RAST CONVERTER OF FONTS, containing a font character address calculator connected to the first outputs with the corresponding information inputs of the control unit, a font reading register connected to the inputs through, a font configuration memory unit with outputs of the font address register, and a font scale register, characterized in that in order to expand the functionality, it has a memory block of variable characteristics of font contour lines, a register of initial coordinates, a block of segment length records, a font address conversion block, an additional calculator block, an information pairing unit and a scan line end registration block, while the second and third outputs are calculated! the character address converter is additionally connected to the first input of the font address register and the input of the font scale register, the output of which is connected to the first input of the additional calculator unit, the first output of the font reading register is connected to the first inputs of the memory block of the changing font configuration characteristics, the second outputs of the font reading register by the second inputs of the additional calculator unit, the third output of the font reading register is connected to the input of the line output end registration unit I, the first output of which is connected to the first input of the control unit, and the second output is connected to the second input of the memory block of variable characteristics of the font configuration, the third inputs of which are connected to the first outputs of the block of additional calculator, the fourth inputs of the memory block of variable characteristics of the font configuration are connected to the first output of the address translation unit connected by the output to the second input of the address register, the first ¹ outputs of the memory block of the variable characteristics of the font configuration are connected to the third inputs of the auxiliary calculator unit ^ the second output of the memory block of variable characteristics of the font configuration is connected to the first input of the address conversion unit, the third output of the memory block of variable characteristics of the font configuration is connected to the second input of the control unit and the second input of the address conversion unit, the second outputs of the additional calculator unit are connected to the first inputs of the information pairing unit, the third outputs of the additional calculator unit are connected to the inputs of the segment length registration unit, whose output is connected to the fourth input SU, 1201174 of the auxiliary calculator unit, the fourth output of which is connected to the input of the initial coordinate register, the output of which is connected to the second input of the information interface unit, the control output of the additional calculator unit is connected to the third input of the control unit connected to the control outputs with the corresponding control inputs of the memory unit variable font configuration characteristics, segment length registration unit, scan line end length unit, address translation unit, block and an additional calculator, block of information gateway register and the initial setting position.